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Hello All! This is a fairly basic genetics question but I was wondering if someone would be willing to take me through the thought process involved. I've always struggled with these types of questions. I would think two Punnett Square's would be involved for the F1 and F2 generations, but I'm not sure how to set them up. In your answers, I would appreciate if it could be specified what each part of the question is trying to imply and paint the whole picture for me in arriving to the answer to your question. Thank you!
A guppy that is homozygous for the traits small size and late maturation (the dominant traits), mates with a guppy that is large and early-maturing, producing F1 offspring. If two of the F1 guppies mate, what percentage of the F2 offspring is expected to be homozygous for those traits favorable to life in the tributary? [Note: Assume all traits are on autosomal chromosomes.]
A. 6.25%
B. 12.5%
C. 25%
D. 50%
For context about the passage see the attached screenshot jpeg.
A guppy that is homozygous for the traits small size and late maturation (the dominant traits), mates with a guppy that is large and early-maturing, producing F1 offspring. If two of the F1 guppies mate, what percentage of the F2 offspring is expected to be homozygous for those traits favorable to life in the tributary? [Note: Assume all traits are on autosomal chromosomes.]
A. 6.25%
B. 12.5%
C. 25%
D. 50%
For context about the passage see the attached screenshot jpeg.
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